EP2828029A1 - Method for cutting a sheet metal blank - Google Patents

Method for cutting a sheet metal blank

Info

Publication number
EP2828029A1
EP2828029A1 EP14705174.2A EP14705174A EP2828029A1 EP 2828029 A1 EP2828029 A1 EP 2828029A1 EP 14705174 A EP14705174 A EP 14705174A EP 2828029 A1 EP2828029 A1 EP 2828029A1
Authority
EP
European Patent Office
Prior art keywords
distance
laser cutting
cutting path
corrected
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14705174.2A
Other languages
German (de)
French (fr)
Other versions
EP2828029B1 (en
Inventor
Heinz Erlwein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schuler Automation GmbH and Co KG
Original Assignee
Schuler Automation GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schuler Automation GmbH and Co KG filed Critical Schuler Automation GmbH and Co KG
Publication of EP2828029A1 publication Critical patent/EP2828029A1/en
Application granted granted Critical
Publication of EP2828029B1 publication Critical patent/EP2828029B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting

Definitions

  • the invention relates to a method for cutting a sheet metal blank with a predetermined contour from a continuously conveyed in a transport direction sheet metal strip.
  • US Pat. No. 8,253,064 B2 and corresponding WO 2009/105608 A1 disclose a method for cutting sheet metal blanks having a predetermined contour from a sheet metal strip continuously conveyed in a transport direction.
  • a laser cutting device is provided with a plurality of in the transport direction and in a direction perpendicular to the transport direction y-direction movable laser cutting heads.
  • the contour of a sheet metal blank is produced by means of the successively arranged in the transport direction laser cutting heads by a plurality of adjoining contour cuts.
  • markings are detected on the metal strip by means of a camera.
  • JP 2001-105170 A discloses another method for cutting a sheet metal blank from a sheet metal strip conveyed in a transport direction.
  • a sensor for detecting the position of the band edge is provided upstream of a laser cutting device.
  • a reel provided upstream of the sensor is moved transversely to the transport direction of the metal strip by means of a suitable control as a function of the values supplied by the sensor.
  • a complex movement device is required.
  • the known method for correcting the position of the band edge is relatively sluggish.
  • the object of the invention is to eliminate the disadvantages of the prior art.
  • a method is to be specified with which sheet metal cans can be cut with a predetermined contour from a continuously conveyed sheet-metal strip safely and reliably.
  • At least one laser cutting device with at least one laser cutting head movable both in the transporting direction and in a perpendicular thereto y direction and a control device for controlling the movement of the laser cutting head along a cutting path corresponding to the predetermined contour, continuously measuring a first distance of a first band edge of the sheet metal strip from a fixed first measuring point in the y-direction by means of an upstream is the first distance measuring device provided for the laser cutting device,
  • the first distance of the first band edge is continuously measured in relation to a fixed first measuring point in the y-direction.
  • the continuously measured first distance values are transmitted to the control device and evaluated there.
  • the position of the strip edge can be detected reliably and reliably by means of a distance measuring device, for example an optical, electrical or tactile distance measuring device.
  • the first distance measuring device may comprise components which are arranged both above and in opposite arrangement below the band edge.
  • the components may be, for example, a plurality of light barriers extending in the y-direction or the like.
  • a second distance of the second band edge opposite the first band edge is continuously measured from a fixed second measuring point in the y direction by means of a second distance measuring device provided upstream of the laser cutting device.
  • the second distance measuring device is expediently opposite in the y-direction. arranged the first distance measuring device.
  • average values are formed in each case from a plurality of time-lapse and spatially successive first and / or second distance values and are used to calculate the corrected value
  • Cutting path uses the mean values.
  • the mean values can be moving averages. This can be avoided by outbreaks and / or bumps in the respective band edge conditional errors.
  • the cutting path is corrected before the production of the cut in the sheet metal strip on the basis of at least one average value calculated from the first and / or second distance values.
  • a predetermined cutting path can be shifted in accordance with a deviation of the sheet metal strip from a desired position in the y direction.
  • an average of the first and the second distance value can also be formed.
  • the corrected cutting path is continuously calculated during the production of the cut in the sheet-metal strip.
  • the calculation of the corrected cutting path is expediently carried out in real time.
  • the cutting path is defined in the cutting program by a plurality of successive location coordinates.
  • the location coordinates leading the laser beam are respectively corrected using the first and / or second distance measurement value in the y direction.
  • correcting the location coordinates is a distance of the first and / or second distance measuring device taken into account by the location coordinate to be corrected in the x direction.
  • a distance traveled in the transport direction path of the metal strip is measured by means provided by a path measuring device provided upstream of the laser cutting device.
  • the path measuring device may be, for example, a measuring wheel resting on the sheet-metal strip with which a path of the sheet-metal strip in the transport direction can be measured.
  • the path measured values are advantageously transmitted to the control device, and the corrected cutting path is calculated by means of the control program using the cutting path predetermined for generation of the contour and the path measured values.
  • the location coordinates of the cutting path can be corrected not only in the y-direction but also in the x-direction.
  • speed fluctuations during transport of the metal strip can be compensated for by a correction of the cutting path. This allows a particularly accurate production of the predetermined contour of the sheet metal blank.
  • the first and / or second distance and path measured values are detected at a distance of at most 2 m, preferably at most 1 m, upstream of the laser cutting device.
  • the first and / or second distance and the path measured values are detected according to a further particularly advantageous embodiment at approximately the same distance in the x-direction upstream of the laser cutting device. This simplifies the calculation of the corrected cutting path. In this case, extrapolation required for the calculation may be performed based on one and the same distance of the distance and displacement measuring devices from the laser cutting device.
  • a device for producing the metal blanks with the predetermined contour may have a reel for receiving a coil.
  • the sheet metal strip is unwound from the coil and conveyed by means of a transport device, such as a whale zen straightening machine, transported in the direction of the laser cutting device.
  • the reel can be movable in the y-direction.
  • a control device may be provided for controlling a position of the reel in the y-direction, such that the position of the metal strip with respect to the laser cutting device is kept within a predetermined desired position range.
  • the desired layer region can be detected by the first and / or second distance measuring device.
  • At least one of the first and / or second distance values can be used as a control variable for controlling a y-position of the reel movable in the y-direction, on which the sheet-metal strip is received as a coil.
  • This can minimize unwanted deviations of the metal strip from its desired position.
  • the deviations of the metal strip in the y direction in the region of the first and / or second distance measuring device can be kept low.
  • the extent of the correction of the cutting path can thus also be kept low. This is an advantage if the correction is only possible within certain limits.
  • a third distance of the first band edge is continuously measured from a fixed third measuring point in the y direction.
  • a first and a third distance of the first band edge at first and third different in the transport direction are continuously measured from a fixed third measuring point in the y direction.
  • an angle ⁇ of the first band edge with respect to a center line can be determined, which is parallel to the transport direction and centrally through the laser cutting device.
  • the angle ⁇ can be used to calculate the corrected cutting path.
  • the cutting path can be rotated accordingly to compensate for an angle of the sheet-metal strip given by the angle .alpha.
  • the third distance measuring device is arranged in the region or upstream of the laser cutting device.
  • the contour by means of a plurality of successively arranged in the transport direction laser cutting devices produced, with each of the laser cutting devices in each case a contour section is generated.
  • a first contour section can be produced, wherein a second contour section is produced by means of a further laser cutting device provided downstream of the laser cutting device, and by means of the control program a predetermined further cutting path corresponding to the second contour section is corrected by using at least the first distance value the further cutting path engages in an end portion of the first cutting path.
  • the cutting path and the further cutting path are corrected so that a predetermined position of a transfer point remains unchanged at the end of the contour section in the y-direction. Ie.
  • the cutting path is corrected so that it ends at the predetermined transfer point.
  • the further cutting path is corrected so that it begins at the predetermined transfer point.
  • the cutting path is corrected so that a transfer point at the end of the cutting path is also corrected using at least the first distance value. Ie. In this case, a predetermined length of the cutting path remains substantially unchanged.
  • the transfer point is moved in the y direction at the end of the cutting path.
  • the distance measuring device (s) is / are tracked in the y-direction with respect to the strip edge, so that the strip edge is always in its measuring range.
  • the strip Edge is always in its measuring range.
  • FIG. 2 shows a schematic plan view of the sheet-metal strip with the sheet-metal strip produced therein.
  • Contour sections a schematic plan view of the metal strip, the Kontu partial cuts on fixed transfer points, a schematic plan view of the metal strip, the Kontu partial cuts on corrected transfer points and a schematic plan view of the sheet metal strip with a contour and a corrected contour.
  • the reference character K denotes a contour of a sheet metal blank 2.
  • the reference character x denotes a transport direction of the sheet-metal strip 1.
  • the transport device may be, for example, a roller leveling machine, a conveyor belt or the like.
  • a laser cutting device not shown in detail here comprises a laser cutting head L which is movable both in the transport direction x and in a y-direction running perpendicular thereto.
  • a first distance measuring device 3 is provided in the region of an edge of the sheet metal strip 1, with which a first actual distance 11 of the sheet metal edge is continuously measured in the y direction relative to the first distance measuring device forming a fixed measuring point.
  • the solid line denotes a first desired position S1 of a first band edge of the sheet-metal strip 1.
  • One of the first target position S1 opposite second target position of a second band edge is denoted by the reference S2.
  • a second distance measuring device 4 is provided in the y direction opposite the first distance measuring device 3.
  • the second distance measuring device 4 also forms a fixed measuring point.
  • a second actual distance 12 of the second band edge of the metal strip 1 relative to the second distance measuring device 4 can be measured continuously.
  • the reference symbol W denotes a displacement measuring device, which is arranged upstream of the laser cutting device.
  • a traveled path of the sheet metal strip 1 in the transport direction x can be detected continuously.
  • it may be a measuring wheel resting on the sheet-metal strip 1.
  • FIG. 1 shows the desired contour K of the sheet metal blank 2. If the sheet metal strip 1 were not moved in the transport direction x, a cutting path of the laser cutting device would correspond to the desired contour K.
  • the sheet-metal strip 1 is transported continuously in the transport direction x.
  • a cutting path for the laser cutting head L is calculated by means of a control program, which results in the desired contour K.
  • the cutting path depends in particular on the transport speed, on the maximum movement speed of the laser cutting head L and on the contour K.
  • a position of the sheet metal strip 1 is defined by a band defined by the first S1 and the second target position S2 of the strip edges. deviates th desired position.
  • the first actual distance 11 of the strip edge is continuously measured according to the invention by means of the first distance measuring device 3.
  • the distance measurement values are transmitted continuously to a control device.
  • a deviation Ayl of the first band edge from the first target position S1 is constantly calculated therefrom.
  • a cutting path for the laser cutting head L is now corrected such that a further contour K 'produced therewith in the y direction is likewise displaced by the first deviation Ayl.
  • the second distance measuring device 4 it is additionally possible to detect a second actual distance 12 of the second band edge by means of the second distance measuring device 4.
  • the further distance measured values can likewise be transmitted to the control device. It can be determined there a second deviation Ay2.
  • an average value can be formed from the first Ayl and the second deviation Ay2, which can then form the basis for the correction of the cutting path.
  • Fig. 2 shows schematically a plan view of the sheet metal strip 1 with over movable in work areas laser cutting heads.
  • the reference symbol L1 denotes a first laser cutting head, which is movable in a first working region A1 both in the transport direction x and in the y direction perpendicular thereto.
  • the second laser cutting head L2 is freely movable in the second working range A2 in the x and y directions.
  • the first work area A1 and the second work area A2 have a first overlap U1 in the y direction.
  • the first A1 and the second working area A2 may also overlap in the x-direction.
  • the reference character M denotes a center line of the laser cutting device.
  • the laser cutting device comprises a third laser cutting head L3 whose third working region A3 is arranged symmetrically relative to the center line M to the first working region A1 of the first laser cutting head L1. Ie. the third work area A3 is located upstream of the second work area A2. It has - similar to the first working area A1 - with the second working area A2 in the y-direction an overlap U2. The third working area A3 and the second working area A2 may also overlap in the x-direction.
  • the first contour cut K1 is produced with the first laser cutting head L1. Simultaneously with the third laser cutting head L3 a third contour section K3 can be produced.
  • the first contour section K1 has a first end point E1 and a second end point E2.
  • the third contour section K3 has a third end point E3 and a fourth end point E4.
  • the corresponding end points of the previously produced first contour section KV are denoted by EV and by E2 '.
  • the end points of a previously prepared third contour section K3 ' are denoted by E3' and E4 '.
  • a second contour section is denoted by the reference symbol K2 ', and a fourth contour section by the reference symbol K4' which is intended to connect the already produced first KV and third contour section K3 '.
  • the reference symbol B1 denotes a first transfer region, which is located in the second working region A2 and how the working regions A1, A2, A3 are stationary. Due to the continuous movement of the sheet metal strip 1 in the transport direction x, the first contour section K1 and possibly the third contour section K3 are moved out of the first work area A1 and possibly the third work area A3 into the second work area A2. As soon as the first end E1 has entered the second working area A2, the second laser cutting head L2 is moved into the first transfer area B1.
  • the second laser cutting head L2 engages in the end section of the first contour section K1 and begins to produce the second contour section K2.
  • FIG. 2 shows the situation shortly before the termination of the second contour section K2.
  • the second laser cutting head L2 is again moved into the first transfer region B1, in order then to produce the fourth contour section K4 indicated by the broken line.
  • the cutting paths corresponding to the contour cuts K1, ⁇ 2 ', K3 and K4' are corrected by using the first deviation Ayl and / or the second deviation Ay2 so that a deviation of the position of the sheet metal strip 1 from the desired position is compensated ,
  • FIGS. 3a and 3b show variants relating to the production of a contour from a plurality of contour cuts.
  • E1, E2, E3 and E4 designate end points or transfer points at which contour cuts K1, K2, K3, K4 begin or end.
  • the transfer points E1, E2, E3, E4 remain unchanged relative to the center line M. Ie. the displacement of the metal strip 1 in the y direction is compensated in this case by a change in the geometry of the contour cuts K1, K2, K3, K4.
  • the contour cuts K1, K2, K3, K4 remain unchanged in their geometry.
  • the contour cuts K1, K2, K3, K4 are shifted by the amount Ay.
  • the transfer points E1, E2, E3, E4 are also shifted by the amount Ay.
  • a third distance measuring device 5 is provided downstream of the first distance measuring device 3, with which a third actual distance 13 of the first band edge of the sheet metal strip 1 can be measured. From a comparison of the first actual distance 11 and the third actual distance 13, an angle ⁇ can be determined by means of the control program, which describes an inclined position of the sheet-metal strip 1 with respect to the x-direction. Using the angle ⁇ , it is possible not only to shift the originally predetermined position of the contour K in the y-direction, but also to rotate by the angle ⁇ . In this case, the corrected contour K 'shown by the dotted line results.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention relates to a method for cutting a sheet metal blank (2) having a predetermined contour (K) from a metal strip (1) that is continuously conveyed in a transport direction (x). The method comprises the following steps: providing at least one laser cutting apparatus having at least one laser cutting head (L, L1, L2, L3) that can be moved in the transport direction (x) and in a y direction perpendicular thereto, and a control device for controlling the movement of the laser cutting head (L, L1, L2, L3) along a cutting path that corresponds to the predetermined contour (K); continuously measuring a first distance (I1) of a first strip edge of the metal strip (1) from a fixed first measurement point in the y direction by means of a first distance measuring device (3) provided upstream of the laser cutting apparatus; transmitting first distance measurement values to the control device; calculating a corrected cutting path while using a predetermined cutting path and the first distance measurement values by means of a control program of the control device; and producing a cut in the metal strip (1) by moving the laser cutting head (L, L1, L2, L3) along the corrected cutting path.

Description

Verfahren zum Schneiden einer Blechplatine  Method for cutting a sheet metal blank
Die Erfindung betrifft ein Verfahren zum Schneiden einer Blechplatine mit einer vorgegebenen Kontur aus einem kontinuierlich in einer Transportrichtung geförderten Blechband. The invention relates to a method for cutting a sheet metal blank with a predetermined contour from a continuously conveyed in a transport direction sheet metal strip.
Die US 8,253,064 B2 sowie die dazu korrespondierende WO 2009/105608 A1 offenbaren ein Verfahren zum Schneiden von Blechplatinen mit einer vorgegebenen Kontur aus einem kontinuierlich in einer Transportrichtung geförderten Blechband. Zum Schneiden des von einem Coil abgewickelten Blechbands ist stromabwärts einer Haspel eine Laserschneideinrichtung mit mehreren in Transportrichtung sowie in einer senkrecht zur Transportrichtung verlaufenden y-Richtung bewegbaren Laserschneidköpfen vorgesehen. Bei dem bekannten Verfahren wird die Kontur einer Blechplatine mittels der in Transportrichtung aufeinanderfolgend angeordneten Laserschneidköpfe durch mehrere aneinander anschließende Konturteilschnitte hergestellt. Zum Ausgleich von Abweichungen des Blechbands von einer durch die Laserschneideinrichtung definierten Mittellinie werden mittels einer Kamera Markierungen auf dem Blechband erfasst. Daraus wird eine Abweichung der Bandmitte von der Mittellinie ermittelt. Unter Verwendung der ermittelten Abweichung werden die Schneidwege der Laserschneidköpfe mittels eines Steuerprogramms entsprechend korrigiert. - Das Vorsehen von Markierungen auf dem Blechband ist aufwändig. Abgesehen davon können Markierungen in der Praxis vor ihrer Erfassung durch die Kamera beschädigt oder Schmutzablagerungen können fälschlicherweise als Markierungen interpretiert werden. Es kann infolgedessen zu erheblichen Störungen bei der Herstellung der Blechplatinen kommen. Schließlich weisen zwei aufeinanderfolgende Markierungen in Transportrichtung jeweils einen Abstand auf. Die Kamera nimmt separat jede der Markierungen auf. Die Auswertung der von der Kamera erfassten Bilder ist zweitaufwändig. Das be- kannte Verfahren ist relativ langsam. Die JP 2001 -105170 A offenbart ein weiteres Verfahren zum Schneiden einer Blechplatine aus einem in einer Transportrichtung geförderten Blechband. Dabei ist stromaufwärts einer Laserschneidvorrichtung ein Sensor zur Erfassung der Lage der Bandkante vorgesehen. Zur Korrektur der Lage der Bandkante wird mit einer geeigneten Steuerung in Abhängigkeit der vom Sensor gelieferten Werte eine stromaufwärts des Sensors vorgesehene Haspel quer zur Transportrichtung des Blechbands bewegt. Zur Bewegung der meistens mehrere Tonnen schweren Haspel ist eine aufwändige Bewegungseinrichtung erforderlich. Das bekannte Verfahren zur Korrektur der Lage der Bandkante ist relativ träge. US Pat. No. 8,253,064 B2 and corresponding WO 2009/105608 A1 disclose a method for cutting sheet metal blanks having a predetermined contour from a sheet metal strip continuously conveyed in a transport direction. For cutting the unwinding of a coil metal band downstream of a reel a laser cutting device is provided with a plurality of in the transport direction and in a direction perpendicular to the transport direction y-direction movable laser cutting heads. In the known method, the contour of a sheet metal blank is produced by means of the successively arranged in the transport direction laser cutting heads by a plurality of adjoining contour cuts. To compensate for deviations of the metal strip from a centerline defined by the laser cutting device markings are detected on the metal strip by means of a camera. From this, a deviation of the center of the band from the center line is determined. Using the determined deviation, the cutting paths of the laser cutting heads are corrected accordingly by means of a control program. - The provision of markings on the sheet metal strip is expensive. Apart from that, in practice, markings may be damaged before they are detected by the camera or dirt deposits may be misinterpreted as marks. As a result, it can lead to significant disruptions in the production of sheet metal blanks. Finally, two successive markings each have a spacing in the transport direction. The camera records each of the markers separately. The evaluation of the images captured by the camera is secondarily expensive. The known method is relatively slow. JP 2001-105170 A discloses another method for cutting a sheet metal blank from a sheet metal strip conveyed in a transport direction. In this case, a sensor for detecting the position of the band edge is provided upstream of a laser cutting device. To correct the position of the strip edge, a reel provided upstream of the sensor is moved transversely to the transport direction of the metal strip by means of a suitable control as a function of the values supplied by the sensor. To move the mostly several tons heavy reel a complex movement device is required. The known method for correcting the position of the band edge is relatively sluggish.
Aufgabe der Erfindung ist es, die Nachteile nach dem Stand der Technik zu beseitigen. Es soll insbesondere ein Verfahren angegeben werden, mit dem sicher und zuverlässig Blechplatinen mit einer vorgegebenen Kontur aus einem kontinuierlich geförderten Blechband geschnitten werden können. The object of the invention is to eliminate the disadvantages of the prior art. In particular, a method is to be specified with which sheet metal cans can be cut with a predetermined contour from a continuously conveyed sheet-metal strip safely and reliably.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Zweckmäßige Ausgestaltungen der Erfindung ergeben sich aus den Merkmalen der Ansprüche 2 bis 18. Nach Maßgabe der Erfindung wird ein Verfahren zum Schneiden einer Blechplatine mit einer vorgegebenen Kontur aus einem kontinuierlich in einer Transportrichtung geförderten Blechband mit folgenden Schritten vorgeschlagen: This object is solved by the features of claim 1. Advantageous embodiments of the invention will become apparent from the features of claims 2 to 18. According to the invention, a method for cutting a metal sheet with a predetermined contour from a continuously conveyed in a transport direction sheet metal strip is proposed with the following steps:
Bereitstellen zumindest einer Laserschneidvorrichtung mit zumindest einem so- wohl in die Transportrichtung als auch in eine senkrecht dazu verlaufende y- Richtung bewegbaren Laserschneidkopf und einer Steuereinrichtung zur Steuerung der Bewegung des Laserschneidkopfs entlang einem zur vorgegebenen Kontur korrespondierenden Schneidweg, fortlaufendes Messen eines ersten Abstands einer ersten Bandkante des Blechbands von einem festen ersten Messpunkt in y-Richtung mittels einer stromauf- wärts der Laserschneidvorrichtung vorgesehenen ersten Abstandsmesseinrich- tung, Providing at least one laser cutting device with at least one laser cutting head movable both in the transporting direction and in a perpendicular thereto y direction and a control device for controlling the movement of the laser cutting head along a cutting path corresponding to the predetermined contour, continuously measuring a first distance of a first band edge of the sheet metal strip from a fixed first measuring point in the y-direction by means of an upstream is the first distance measuring device provided for the laser cutting device,
Übermitteln erster Abstandsmesswerte an die Steuereinrichtung, Transmitting first distance measurement values to the control device,
Berechnen eines korrigierten Schneidwegs unter Verwendung eines vorgegebenen Schneidwegs und der ersten Abstandsmesswerte mittels eines Steuerprogramms der Steuereinrichtung, und Erzeugen eines Schnitts im Blechband durch Bewegen des Laserschneidkopfs entlang des korrigierten Schneidwegs. Calculating a corrected cutting path using a predetermined cutting path and the first distance measurement values by means of a control program of the control device; and generating a cut in the sheet metal strip by moving the laser cutting head along the corrected cutting path.
Erfindungsgemäß wird der erste Abstand der ersten Bandkante fortlaufend gegenüber einem festen ersten Messpunkt in y-Richtung gemessen. Die fortlaufend gemessenen ersten Abstandswerte werden an die Steuereinrichtung übermittelt und dort ausgewertet. Die Lage der Bandkante lässt sich mittels einer Abstands- messeinrichtung, beispielsweise einer optischen, elektrischen oder taktilen Ab- standsmesseinrichtung, sicher und zuverlässig erfassen. Zu diesem Zweck kann die erste Abstandsmesseinrichtung Komponenten umfassen, welche sowohl ober- halb als auch in gegenüberliegender Anordnung unterhalb der Bandkante angeordnet sind. Bei den Komponenten kann es sich beispielsweise um eine Vielzahl sich in y-Richtung erstreckender Lichtschranken oder dgl. handeln. Indem die ersten Abstandswerte fortlaufend, beispielsweise mit einer Frequenz im Bereich von 50 bis 500 Hz, gemessen werden, steht dem Steuerprogramm jederzeit ein aktuel- ler erster Abstandsmesswert zur Verfügung. Damit können Fehler bei der Korrektur des Schneidwegs vermieden werden. According to the invention, the first distance of the first band edge is continuously measured in relation to a fixed first measuring point in the y-direction. The continuously measured first distance values are transmitted to the control device and evaluated there. The position of the strip edge can be detected reliably and reliably by means of a distance measuring device, for example an optical, electrical or tactile distance measuring device. For this purpose, the first distance measuring device may comprise components which are arranged both above and in opposite arrangement below the band edge. The components may be, for example, a plurality of light barriers extending in the y-direction or the like. By continuously measuring the first distance values, for example with a frequency in the range of 50 to 500 Hz, the control program is always provided with a current first distance measurement value. This can be avoided errors in the correction of the cutting path.
Nach einer vorteilhaften Ausgestaltung wird ein zweiter Abstand einer der ersten Bandkante gegenüberliegenden zweiten Bandkante von einem festen zweiten Messpunkt in y-Richtung mittels einer stromaufwärts der Laserschneidvorrichtung vorgesehenen zweiten Abstandsmesseinrichtung fortlaufend gemessen. Die zweite Abstandsmesseinrichtung ist in y-Richtung zweckmäßigerweise gegenüberlie- gend der ersten Abstandsmesseinrichtung angeordnet. Unter Verwendung der ersten und der zweiten Abstandsmesswerte kann festgestellt werden, ob sich eine Breite des Blechbands ändert und/oder welche Breite das Blechband hat. Zweckmäßigerweise wird der korrigierte Schneidweg also zusätzlich unter Verwendung der zweiten Abstandsmesswerte berechnet. Das ermöglicht eine Korrektur des Schneidwegs mit verbesserter Genauigkeit. According to an advantageous embodiment, a second distance of the second band edge opposite the first band edge is continuously measured from a fixed second measuring point in the y direction by means of a second distance measuring device provided upstream of the laser cutting device. The second distance measuring device is expediently opposite in the y-direction. arranged the first distance measuring device. Using the first and the second distance measurement values, it is possible to determine whether a width of the sheet metal strip changes and / or which width the sheet metal strip has. Expediently, the corrected cutting path is thus additionally calculated using the second distance measurement values. This enables correction of the cutting path with improved accuracy.
Nach einer weiteren vorteilhaften Ausgestaltung werden aus einer Mehrzahl zeit- lieh und örtlich aufeinanderfolgender erster und/oder zweiter Abstandswerte jeweils Mittelwerte gebildet und es werden zur Berechnung des korrigierten According to a further advantageous embodiment, average values are formed in each case from a plurality of time-lapse and spatially successive first and / or second distance values and are used to calculate the corrected value
Schneidwegs die Mittelwerte verwendet. Die Mittelwerte können gleitende Mittelwerte sein. Damit können durch Ausbrüche und/oder Unebenheiten in der jeweiligen Bandkante bedingte Fehler vermieden werden. Cutting path uses the mean values. The mean values can be moving averages. This can be avoided by outbreaks and / or bumps in the respective band edge conditional errors.
Nach einer Alternative der Erfindung wird der Schneidweg vor der Erzeugung des Schnitts im Blechband auf der Grundlage zumindest eines aus den ersten und/oder zweiten Abstandswerten berechneten Mittelwerts korrigiert. D. h. ein vorgegebener Schneidweg kann in einem einfachen Fall der Korrektur entspre- chend einer Abweichung des Blechbands von einer Soll-Lage in y-Richtung verschoben werden. Zur Berechnung der Verschiebung des Schneidwegs kann auch ein Mittelwert aus dem ersten und dem zweiten Abstandswert gebildet werden. According to an alternative of the invention, the cutting path is corrected before the production of the cut in the sheet metal strip on the basis of at least one average value calculated from the first and / or second distance values. Ie. In a simple case of the correction, a predetermined cutting path can be shifted in accordance with a deviation of the sheet metal strip from a desired position in the y direction. To calculate the displacement of the cutting path, an average of the first and the second distance value can also be formed.
Nach einer weiteren Alternative der Erfindung wird der korrigierte Schneidweg während der Erzeugung des Schnitts im Blechband fortlaufend berechnet. Die Berechnung des korrigierten Schneidwegs wird zweckmäßigerweise in Echtzeit durchgeführt. Der Schneidweg ist im Schneidprogramm durch eine Vielzahl aufeinanderfolgender Ortskoordinaten definiert. Bei einer fortlaufenden Korrektur des Schneidwegs werden die dem Laserstrahl vorlaufenden Ortskoordinaten jeweils unter Verwendung des ersten und/oder zweiten Abstandsmesswerts in y-Richtung korrigiert. Bei der Korrektur der Ortskoordinaten wird ein Abstand der ersten und/oder zweiten Abstandsmesseinrichtung von der zu korrigierenden Ortskoordinate in x-Richtung berücksichtigt. According to a further alternative of the invention, the corrected cutting path is continuously calculated during the production of the cut in the sheet-metal strip. The calculation of the corrected cutting path is expediently carried out in real time. The cutting path is defined in the cutting program by a plurality of successive location coordinates. With a continuous correction of the cutting path, the location coordinates leading the laser beam are respectively corrected using the first and / or second distance measurement value in the y direction. When correcting the location coordinates is a distance of the first and / or second distance measuring device taken into account by the location coordinate to be corrected in the x direction.
Nach einer weiteren Ausgestaltung der Erfindung wird ein in Transportrichtung zurückgelegter Weg des Blechbands mittels einer stromaufwärts der Laserschneidvorrichtung vorgesehenen Wegmesseinrichtung gemessen. Bei der Wegmesseinrichtung kann es sich beispielsweise ein am Blechband anliegendes Messrad handeln, mit dem ein Weg des Blechbands in Transportrichtung messbar ist. Die Wegmesswerte werden vorteilhafterweise an die Steuereinrichtung über- mittelt und es wird mittels des Steuerprogramms der korrigierte Schneidweg unter Verwendung des zur Erzeugung der Kontur vorgegebenen Schneidwegs und der Wegmesswerte berechnet. D. h. unter Verwendung der von der Wegmesseinrichtung gelieferten Wegmesswerte können die Ortskoordinaten des Schneidwegs nicht nur in y-Richtung, sondern auch in x-Richtung korrigiert werden. Damit kön- nen beispielsweise Geschwindigkeitsfluktuationen beim Transport des Blechbands durch eine Korrektur des Schneidwegs kompensiert werden. Das ermöglicht eine besonders genaue Herstellung der vorgegebenen Kontur der Blechplatine. According to a further embodiment of the invention, a distance traveled in the transport direction path of the metal strip is measured by means provided by a path measuring device provided upstream of the laser cutting device. The path measuring device may be, for example, a measuring wheel resting on the sheet-metal strip with which a path of the sheet-metal strip in the transport direction can be measured. The path measured values are advantageously transmitted to the control device, and the corrected cutting path is calculated by means of the control program using the cutting path predetermined for generation of the contour and the path measured values. Ie. using the path measurements provided by the path measuring device, the location coordinates of the cutting path can be corrected not only in the y-direction but also in the x-direction. Thus, for example, speed fluctuations during transport of the metal strip can be compensated for by a correction of the cutting path. This allows a particularly accurate production of the predetermined contour of the sheet metal blank.
Nach einer weiteren vorteilhaften Ausgestaltung werden die ersten und/oder zwei- ten Abstands- und Wegmesswerte in einem Abstand von höchstens 2 m, vorzugsweise höchstens 1 m, stromaufwärts der Laserschneidvorrichtung erfasst. Die ersten und/oder zweiten Abstands- und die Wegmesswerte werden nach einer weiteren besonders vorteilhaften Ausgestaltung etwa im selben Abstand in x- Richtung stromaufwärts der Laserschneidvorrichtung erfasst. Das vereinfacht die Berechnung des korrigierten Schneidwegs. Eine zur Berechnung erforderliche Extrapolation kann in diesem Fall auf der Grundlage ein und desselben Abstands der Abstands- und Wegmesseinrichtungen von der Laserschneidvorrichtung durchgeführt werden. Eine Vorrichtung zum Herstellen der Blechplatinen mit der vorgegebenen Kontur kann eine Haspel zur Aufnahme eines Coils aufweisen. Das Blechband wird vom Coil abgewickelt und mittels einer Transportvorrichtung, beispielsweise einer Wal- zenrichtmaschine, in Richtung der Laserschneidvorrichtung transportiert. Die Haspel kann in y-Richtung bewegbar sein. Ferner kann eine Regeleinrichtung zur Regelung einer Position der Haspel in y-Richtung vorgesehen sein, derart, dass die Lage des Blechbands bezüglich der Laserschneideinrichtung innerhalb eines vor- gegebenen Soll-Lagenbereichs gehalten wird. Der Soll-Lagenbereich kann durch die erste und/oder zweite Abstandsmesseinrichtung erfasst werden. Vorteilhafterweise kann also zumindest einer der ersten und/oder zweiten Abstandswerte als Regelgröße zur Regelung einer y-Position der in y-Richtung bewegbaren Haspel verwendet werden, auf der das Blechband als Coil aufgenommen ist. Damit kön- nen unerwünschte Abweichungen des Blechbands von dessen Soll-Lage minimiert werden. Infolgedessen können auch die Abweichungen des Blechbands in y- Richtung im Bereich der ersten und/oder zweiten Abstandsmesseinrichtung gering gehalten werden. Das Ausmaß der Korrektur des Schneidwegs kann damit ebenfalls gering gehalten werden. Das ist von Vorteil, wenn die Korrektur nur innerhalb bestimmter Grenzen möglich ist. According to a further advantageous embodiment, the first and / or second distance and path measured values are detected at a distance of at most 2 m, preferably at most 1 m, upstream of the laser cutting device. The first and / or second distance and the path measured values are detected according to a further particularly advantageous embodiment at approximately the same distance in the x-direction upstream of the laser cutting device. This simplifies the calculation of the corrected cutting path. In this case, extrapolation required for the calculation may be performed based on one and the same distance of the distance and displacement measuring devices from the laser cutting device. A device for producing the metal blanks with the predetermined contour may have a reel for receiving a coil. The sheet metal strip is unwound from the coil and conveyed by means of a transport device, such as a whale zen straightening machine, transported in the direction of the laser cutting device. The reel can be movable in the y-direction. Furthermore, a control device may be provided for controlling a position of the reel in the y-direction, such that the position of the metal strip with respect to the laser cutting device is kept within a predetermined desired position range. The desired layer region can be detected by the first and / or second distance measuring device. Advantageously, therefore, at least one of the first and / or second distance values can be used as a control variable for controlling a y-position of the reel movable in the y-direction, on which the sheet-metal strip is received as a coil. This can minimize unwanted deviations of the metal strip from its desired position. As a result, the deviations of the metal strip in the y direction in the region of the first and / or second distance measuring device can be kept low. The extent of the correction of the cutting path can thus also be kept low. This is an advantage if the correction is only possible within certain limits.
Vorteilhafterweise wird mittels einer dritten Abstandsmesseinrichtung ein dritter Abstand der ersten Bandkante von einem festen dritten Messpunkt in y-Richtung fortlaufend gemessen. Indem ein erster und ein dritter Abstand der ersten Band- kante an in Transportrichtung voneinander verschiedenen ersten und drittenAdvantageously, by means of a third distance measuring device, a third distance of the first band edge is continuously measured from a fixed third measuring point in the y direction. In that a first and a third distance of the first band edge at first and third different in the transport direction
Messpunkten gemessen wird, kann ein Winkel α der ersten Bandkante bezüglich einer Mittellinie bestimmt werden, welche parallel zur Transportrichtung und mittig durch die Laserschneidvorrichtung verläuft. Der Winkel α kann zur Berechnung des korrigierten Schneidwegs verwendet werden. Der Schneidweg kann zur Kom- pensation einer durch den Winkel α gegebenen Schräglage des Blechbands entsprechend rotiert werden. Measuring points is measured, an angle α of the first band edge with respect to a center line can be determined, which is parallel to the transport direction and centrally through the laser cutting device. The angle α can be used to calculate the corrected cutting path. The cutting path can be rotated accordingly to compensate for an angle of the sheet-metal strip given by the angle .alpha.
Zweckmäßigerweise ist die dritte Abstandsmesseinrichtung im Bereich oder stromaufwärts der Laserschneidvorrichtung angeordnet. Conveniently, the third distance measuring device is arranged in the region or upstream of the laser cutting device.
Nach einer Ausgestaltung der Erfindung wird die Kontur mittels mehrerer in Transportrichtung aufeinanderfolgend angeordneter Laserschneidvorrichtungen hergestellt, wobei mit jeder der Laserschneidvorrichtungen jeweils ein Konturteilschnitt erzeugt wird. So kann mittels der Laserschneidvorrichtung ein erster Konturteilschnitt hergestellt werden, wobei mittels einer stromabwärts der Laserschneidvorrichtung vorgesehenen weiteren Laserschneidvorrichtung ein zweiter Konturteilschnitt hergestellt wird, und wobei mittels des Steuerprogramms ein zum zweiten Konturteilschnitt korrespondierender vorgegebener weiterer Schneidweg unter Verwendung zumindest des ersten Abstandswerts so korrigiert wird, dass der weitere Schneidweg in einen Endabschnitt des ersten Schneidweg eingreift. Damit wird sichergestellt, dass auch im Falle einer Korrektur des Schneidwegs ein sich daran anschließender weiterer Schneidweg in den Schneidweg eingreift und damit der erste Konturteilschnitt durch den zweiten Konturteilschnitt ohne Unterbrechung fortgesetzt wird. According to one embodiment of the invention, the contour by means of a plurality of successively arranged in the transport direction laser cutting devices produced, with each of the laser cutting devices in each case a contour section is generated. Thus, by means of the laser cutting device, a first contour section can be produced, wherein a second contour section is produced by means of a further laser cutting device provided downstream of the laser cutting device, and by means of the control program a predetermined further cutting path corresponding to the second contour section is corrected by using at least the first distance value the further cutting path engages in an end portion of the first cutting path. This ensures that even in the case of a correction of the cutting path an adjoining further cutting path engages in the cutting path and thus the first contour section is continued through the second contour section without interruption.
Hinsichtlich der Fortsetzung des Schneidwegs durch den weiteren Schneidweg werden zwei Alternativen als vorteilhaft angesehen. Nach einer ersten Alternative werden der Schneidweg und der weitere Schneidweg so korrigiert, dass eine vorgegebene Lage eines Übergabepunkts am Ende des Konturteilschnitts in y-Rich- tung unverändert bleibt. D. h. in diesem Fall wird der Schneidweg so korrigiert, dass er am vorgegebenen Übergabepunkt endet. Der weitere Schneidweg wird so korrigiert, dass er am vorgegebenen Übergabepunkt beginnt. With regard to the continuation of the cutting path through the further cutting path, two alternatives are considered advantageous. According to a first alternative, the cutting path and the further cutting path are corrected so that a predetermined position of a transfer point remains unchanged at the end of the contour section in the y-direction. Ie. In this case, the cutting path is corrected so that it ends at the predetermined transfer point. The further cutting path is corrected so that it begins at the predetermined transfer point.
Nach einer weiteren Alternative wird der Schneidweg so korrigiert, dass auch ein Übergabepunkt am Ende des Schneidwegs unter Verwendung zumindest des ersten Abstandswerts korrigiert wird. D. h. in diesem Fall bleibt eine vorgegebene Länge des Schneidwegs im Wesentlichen unverändert. Bei der Korrektur des Schneidwegs wird der Übergabepunkt am Ende des Schneidwegs in y-Richtung verschoben. According to a further alternative, the cutting path is corrected so that a transfer point at the end of the cutting path is also corrected using at least the first distance value. Ie. In this case, a predetermined length of the cutting path remains substantially unchanged. When correcting the cutting path, the transfer point is moved in the y direction at the end of the cutting path.
Nach einer weiteren Ausgestaltung wird/werden die Abstandsmesseinrichtung/en in y-Richtung bezüglich der Bandkante nachgeführt, so dass die Bandkante stets in deren Messbereich sich befindet. Damit kann im Falle einer Abweichung des Blechbands von seiner Soll-Lage jederzeit sichergestellt werden, dass die Band- kante nicht aus dem Messbereich einer Abstandsmesseinrichtung sich entfernt oder mit der Abstandsmesseinrichtung kollidiert. According to a further embodiment, the distance measuring device (s) is / are tracked in the y-direction with respect to the strip edge, so that the strip edge is always in its measuring range. Thus, in the event of a deviation of the metal strip from its desired position, it can be ensured at all times that the strip Edge is not removed from the measuring range of a distance measuring device or collided with the distance measuring device.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnun- gen näher erläutert. Es zeigen: eine schematische Draufsicht auf ein Blechband mit einer daraus auszuschneidenden Blechplatine, Fig. 2 eine schematische Draufsicht auf das Blechband mit darin erzeugten Exemplary embodiments of the invention will be explained in more detail below with reference to the drawings. FIG. 2 shows a schematic plan view of the sheet-metal strip with the sheet-metal strip produced therein. FIG
Konturteilschnitten, eine schematische Draufsicht auf das Blechband, wobei die Kontu teilschnitte an festen Übergabepunkten enden, eine schematische Draufsicht auf das Blechband, wobei die Kontu teilschnitte an korrigierten Übergabepunkten enden und eine schematische Draufsicht auf das Blechband mit einer Kontur und einer korrigierten Kontur.  Contour sections, a schematic plan view of the metal strip, the Kontu partial cuts on fixed transfer points, a schematic plan view of the metal strip, the Kontu partial cuts on corrected transfer points and a schematic plan view of the sheet metal strip with a contour and a corrected contour.
Fig. 1 zeigt schematisch eine Draufsicht auf ein Blechband 1 . Mit dem Bezugszeichen K ist eine Kontur einer Blechplatine 2 bezeichnet. Mit dem Bezugszeichen x ist eine Transportrichtung des Blechbands 1 bezeichnet. Zum Transport in die Transportrichtung x wird das Blechband 1 mittels einer Transporteinrichtung (hier nicht gezeigt) kontinuierlich bewegt. Bei der Transporteinrichtung kann es sich beispielsweise um eine Walzenrichtmaschine, ein Transportband oder dgl. handeln. 1 shows schematically a plan view of a sheet-metal strip 1. The reference character K denotes a contour of a sheet metal blank 2. The reference character x denotes a transport direction of the sheet-metal strip 1. For transport in the transport direction x, the sheet-metal strip 1 is continuously moved by means of a transport device (not shown here). The transport device may be, for example, a roller leveling machine, a conveyor belt or the like.
Eine hier nicht näher gezeigte Laserschneidvorrichtung umfasst einen Laserschneidkopf L, der sowohl in Transportrichtung x als auch in eine senkrecht dazu verlaufende y-Richtung bewegbar ist. Stromaufwärts der Laserschneidvorrichtung ist im Bereich einer Kante des Blechbands 1 eine erste Abstandsmesseinrichtung 3 vorgesehen, mit der ein erster Ist-Abstand 11 der Blechkante gegenüber der einen festen Messpunkt bildenden ersten Abstandsmesseinrichtung in y-Richtung fortlaufend gemessen wird. Mit der durchgezogenen Linie ist eine erste Soll-Lage S1 einer ersten Bandkante des Blechbands 1 bezeichnet. Eine der ersten Soll- Lage S1 gegenüberliegende zweite Soll-Lage einer zweiten Bandkante ist mit dem Bezugszeichen S2 bezeichnet. Im Bereich der zweiten Bandkante ist in y-Richtung gegenüberliegend der ersten Abstandsmesseinrichtung 3 eine zweite Abstandsmesseinrichtung 4 vorgesehen. Die zweite Abstandsmesseinrichtung 4 bildet ebenfalls einen festen Messpunkt. Damit kann ein zweiter Ist-Abstand 12 der zweiten Bandkante des Blechbands 1 gegenüber der zweiten Abstandsmesseinrichtung 4 fortlaufend gemessen werden. A laser cutting device not shown in detail here comprises a laser cutting head L which is movable both in the transport direction x and in a y-direction running perpendicular thereto. Upstream of the laser cutter a first distance measuring device 3 is provided in the region of an edge of the sheet metal strip 1, with which a first actual distance 11 of the sheet metal edge is continuously measured in the y direction relative to the first distance measuring device forming a fixed measuring point. The solid line denotes a first desired position S1 of a first band edge of the sheet-metal strip 1. One of the first target position S1 opposite second target position of a second band edge is denoted by the reference S2. In the region of the second band edge, a second distance measuring device 4 is provided in the y direction opposite the first distance measuring device 3. The second distance measuring device 4 also forms a fixed measuring point. Thus, a second actual distance 12 of the second band edge of the metal strip 1 relative to the second distance measuring device 4 can be measured continuously.
Mit dem Bezugszeichen W ist eine Wegmesseinrichtung bezeichnet, welche stromaufwärts der Laserschneidvorrichtung angeordnet ist. Mit der Wegmesseinrichtung W kann kontinuierlich ein zurückgelegter Weg des Blechbands 1 in Transportrichtung x erfasst werden. Es kann sich dabei beispielsweise um ein am Blechband 1 anliegendes Messrad handeln. Fig. 1 zeigt die gewünschte Kontur K der Blechplatine 2. Falls das Blechband 1 nicht in Transportrichtung x bewegt würde, würde ein Schneidweg der Laserschneidvorrichtung der gewünschten Kontur K entsprechen. The reference symbol W denotes a displacement measuring device, which is arranged upstream of the laser cutting device. With the path measuring device W, a traveled path of the sheet metal strip 1 in the transport direction x can be detected continuously. For example, it may be a measuring wheel resting on the sheet-metal strip 1. FIG. 1 shows the desired contour K of the sheet metal blank 2. If the sheet metal strip 1 were not moved in the transport direction x, a cutting path of the laser cutting device would correspond to the desired contour K.
Beim erfindungsgemäßen Verfahren wird das Blechband 1 allerdings kontinuier- lieh in Transportrichtung x transportiert. In Abhängigkeit der Transportgeschwindigkeit wird mittels eines Steuerprogramms ein Schneidweg für den Laserschneidkopf L berechnet, welcher die gewünschte Kontur K ergibt. Der Schneidweg hängt insbesondere von der Transportgeschwindigkeit, von der maximalen Bewegungsgeschwindigkeit des Laserschneidkopfs L und von der Kontur K ab. In the method according to the invention, however, the sheet-metal strip 1 is transported continuously in the transport direction x. Depending on the transport speed, a cutting path for the laser cutting head L is calculated by means of a control program, which results in the desired contour K. The cutting path depends in particular on the transport speed, on the maximum movement speed of the laser cutting head L and on the contour K.
Im praktischen Betrieb kann es dazu kommen, dass eine Lage des Blechbands 1 von einer durch die erste S1 und die zweite Soll-Lage S2 der Bandkanten definier- ten Soll-Lage abweicht. Zur Kompensation derartiger Abweichungen von der Soll- Lage wird erfindungsgemäß mittels der ersten Abstandsmesseinrichtung 3 fortlaufend der erste Ist-Abstand 11 der Bandkante gemessen. Die Abstandsmesswerte werden fortlaufend an eine Steuereinrichtung übermittelt. Mittels eines Steuerpro- gramms der Steuereinrichtung wird daraus ständig eine Abweichung Ayl der ersten Bandkante von der ersten Soll-Lage S1 berechnet. Unter Verwendung der ersten Abweichung Ayl wird nun ein Schneidweg für den Laserschneidkopf L so korrigiert, dass eine damit hergestellte weitere Kontur K' in y-Richtung ebenfalls um die erste Abweichung Ayl verschoben ist. In practical operation, it can happen that a position of the sheet metal strip 1 is defined by a band defined by the first S1 and the second target position S2 of the strip edges. deviates th desired position. To compensate for such deviations from the desired position, the first actual distance 11 of the strip edge is continuously measured according to the invention by means of the first distance measuring device 3. The distance measurement values are transmitted continuously to a control device. By means of a control program of the control device, a deviation Ayl of the first band edge from the first target position S1 is constantly calculated therefrom. Using the first deviation Ayl, a cutting path for the laser cutting head L is now corrected such that a further contour K 'produced therewith in the y direction is likewise displaced by the first deviation Ayl.
Nach einer Variante ist es zusätzlich möglich, mittels der zweiten Abstandsmesseinrichtung 4 einen zweiten Ist-Abstand 12 der zweiten Bandkante zu erfassen. Die weiteren Abstandsmesswerte können ebenfalls an die Steuereinrichtung übermittelt werden. Es kann dort eine zweite Abweichung Ay2 ermittelt werden. Mittels des Steuerprogramms kann aus der ersten Ayl und der zweiten Abweichung Ay2 ein Mittelwert gebildet werden, welcher sodann die Grundlage für die Korrektur des Schneidwegs bilden kann. According to a variant, it is additionally possible to detect a second actual distance 12 of the second band edge by means of the second distance measuring device 4. The further distance measured values can likewise be transmitted to the control device. It can be determined there a second deviation Ay2. By means of the control program, an average value can be formed from the first Ayl and the second deviation Ay2, which can then form the basis for the correction of the cutting path.
Unter Verwendung der von der Wegmesseinrichtung W gelieferten Wegmesse- werte können bei der Korrektur des Schneidwegs zusätzlich Fluktuationen in der Transportgeschwindigkeit des Blechbands 1 berücksichtigt werden. D. h. die den Schneidweg definierten Ortskoordinaten können also nicht nur in y-Richtung, sondern unter Verwendung der von der Wegmesseinrichtung W gelieferten Werte auch in x-Richtung korrigiert werden. Using the path measurement values supplied by the path measuring device W, fluctuations in the transport speed of the sheet-metal strip 1 can additionally be taken into account when correcting the cutting path. Ie. The spatial coordinates defined by the cutting path can thus be corrected not only in the y direction but also in the x direction using the values supplied by the path measuring device W.
Fig. 2 zeigt schematisch eine Draufsicht auf das Blechband 1 mit darüber in Arbeitsbereichen bewegbaren Laserschneidköpfen. Mit dem Bezugszeichen L1 ist ein erster Laserschneidkopf bezeichnet, welcher in einem ersten Arbeitsbereich A1 sowohl in Transportrichtung x als auch in der senkrecht dazu verlaufenden y- Richtung bewegbar ist. In Transportrichtung x stromabwärts des ersten Arbeitsbereichs A1 befindet sich ein zweiter Arbeitsbereich A2 eines zweiten Laserschneidkopfs L2. Der zweite Laserschneidkopf L2 ist im zweiten Arbeitsbereich A2 in x- und y-Richtung frei bewegbar. Der erste Arbeitsbereich A1 und der zweite Arbeitsbereich A2 weisen in y-Richtung eine erste Überlappung U1 auf. Der erste A1 und der zweite Arbeitsbereich A2 können auch in x-Richtung überlappen. Fig. 2 shows schematically a plan view of the sheet metal strip 1 with over movable in work areas laser cutting heads. The reference symbol L1 denotes a first laser cutting head, which is movable in a first working region A1 both in the transport direction x and in the y direction perpendicular thereto. In the transport direction x downstream of the first working area A1 there is a second working area A2 of a second laser cutting head L2. The second laser cutting head L2 is freely movable in the second working range A2 in the x and y directions. The first work area A1 and the second work area A2 have a first overlap U1 in the y direction. The first A1 and the second working area A2 may also overlap in the x-direction.
Mit dem Bezugszeichen M ist eine Mittellinie der Laserschneidvorrichtung bezeichnet. Die Laserschneidvorrichtung umfasst einen dritten Laserschneidkopf L3, dessen dritter Arbeitsbereich A3 bezüglich der Mittellinie M symmetrisch zum ersten Arbeitsbereich A1 des ersten Laserschneidkopfs L1 angeordnet ist. D. h. der dritte Arbeitsbereich A3 befindet sich stromaufwärts des zweiten Arbeitsbereichs A2. Er weist - ähnlich wie der erste Arbeitsbereich A1 - mit dem zweiten Arbeitsbereich A2 in y-Richtung eine Überlappung U2 auf. Der dritte Arbeitsbereich A3 und der zweite Arbeitsbereich A2 können auch in x-Richtung überlappen. The reference character M denotes a center line of the laser cutting device. The laser cutting device comprises a third laser cutting head L3 whose third working region A3 is arranged symmetrically relative to the center line M to the first working region A1 of the first laser cutting head L1. Ie. the third work area A3 is located upstream of the second work area A2. It has - similar to the first working area A1 - with the second working area A2 in the y-direction an overlap U2. The third working area A3 and the second working area A2 may also overlap in the x-direction.
Zur Herstellung der Blechplatine 2 wird mit dem ersten Laserschneidkopf L1 der erste Konturteilschnitt K1 hergestellt. Simultan dazu kann mit dem dritten Laserschneidkopf L3 ein dritter Konturteilschnitt K3 hergestellt werden. Der erste Kon- turteilschnitt K1 weist einen ersten Endpunkt E1 und einen zweiten Endpunkt E2 auf. Der dritte Konturteilschnitt K3 weist einen dritten Endpunkt E3 und einen vierten Endpunkt E4 auf. Die entsprechenden Endpunkt des zuvor hergestellten ersten Konturteilschnitts KV sind mit EV und mit E2' bezeichnet. Die Endpunkte eines zuvor hergestellten dritten Konturteilschnitts K3' sind mit E3' und E4' bezeichnet. To produce the sheet metal blank 2, the first contour cut K1 is produced with the first laser cutting head L1. Simultaneously with the third laser cutting head L3 a third contour section K3 can be produced. The first contour section K1 has a first end point E1 and a second end point E2. The third contour section K3 has a third end point E3 and a fourth end point E4. The corresponding end points of the previously produced first contour section KV are denoted by EV and by E2 '. The end points of a previously prepared third contour section K3 'are denoted by E3' and E4 '.
In Fig. 2 ist mit dem Bezugszeichen K2' ein zweiter Konturteilschnitt und mit dem Bezugszeichen K4' ein vierter Konturteilschnitt bezeichnet, welcher die bereits herstellten ersten KV und dritten Konturteilschnitte K3' verbinden sollen. Mit dem Bezugszeichen B1 ist ein erster Übergabebereich bezeichnet, welcher sich im zweiten Arbeitsbereich A2 befindet und wie die Arbeitsbereiche A1 , A2, A3 stationär ist. Bedingt durch die kontinuierliche Bewegung des Blechbands 1 in Transportrichtung x werden der ersten Konturteilschnitt K1 und ggf. der dritte Konturteilschnitt K3 aus dem ersten Arbeitsbereich A1 sowie ggf. den dritten Arbeitsbereich A3 in den zweiten Arbeitsbereich A2 bewegt. Sobald das erste Ende E1 in den zweiten Arbeitsbereich A2 eingetreten ist, wird der zweite Laserschneidkopf L2 in den ersten Übergabebereich B1 bewegt. Der zweite Laserschneidkopf L2 greift in den Endabschnitt des ersten Konturteilschnitts K1 ein und beginnt damit, den zweiten Konturteilschnitt K2 herzustellen. Fig. 2 zeigt die Situation kurz vor Beendigung des zweiten Konturteilschnitts K2. Unmittelbar nach der Beendigung des zweiten Konturteilschnitts K2 wird der zweite Laserschneidkopf L2 wieder in den ersten Übergabebereich B1 verfahren, um dann den mit der unterbrochenen Linie angedeuteten vierten Konturteilschnitt K4 herzustellen. In FIG. 2, a second contour section is denoted by the reference symbol K2 ', and a fourth contour section by the reference symbol K4' which is intended to connect the already produced first KV and third contour section K3 '. The reference symbol B1 denotes a first transfer region, which is located in the second working region A2 and how the working regions A1, A2, A3 are stationary. Due to the continuous movement of the sheet metal strip 1 in the transport direction x, the first contour section K1 and possibly the third contour section K3 are moved out of the first work area A1 and possibly the third work area A3 into the second work area A2. As soon as the first end E1 has entered the second working area A2, the second laser cutting head L2 is moved into the first transfer area B1. The second laser cutting head L2 engages in the end section of the first contour section K1 and begins to produce the second contour section K2. FIG. 2 shows the situation shortly before the termination of the second contour section K2. Immediately after the termination of the second contour section K2, the second laser cutting head L2 is again moved into the first transfer region B1, in order then to produce the fourth contour section K4 indicated by the broken line.
Erfindungsgemäß werden die zu den Konturteilschnitten K1 , Κ2', K3 und K4' kor- respondierenden Schneidwege unter Verwendung der ersten Abweichung Ayl und/oder der zweiten Abweichung Ay2 so korrigiert, dass eine Abweichung der Lage des Blechbands 1 von der Soll-Lage kompensiert wird. According to the invention, the cutting paths corresponding to the contour cuts K1, Κ2 ', K3 and K4' are corrected by using the first deviation Ayl and / or the second deviation Ay2 so that a deviation of the position of the sheet metal strip 1 from the desired position is compensated ,
Die Fig. 3a und 3b zeigen Varianten bezüglich der Herstellung einer Kontur aus mehreren Konturteilschnitten. Mit unterbrochenen Linien sind die in y-Richtung um den Betrag Ay verschobenen Bandkanten des Blechbands 1 gezeigt. Mit E1 , E2, E3 und E4 sind End- bzw. Übergabepunkte bezeichnet, bei denen Konturteilschnitte K1 , K2, K3, K4 beginnen oder enden. Bei der in Fig. 3a gezeigten ersten Variante bleiben die Übergabepunkte E1 , E2, E3, E4 relativ zur Mittellinie M unverändert. D. h. die Verschiebung des Blechbands 1 in y-Richtung wird in diesem Fall durch eine Änderung der Geometrie der Konturteilschnitte K1 , K2, K3, K4 kompensiert. Bei der in Fig. 3b gezeigten zweiten Variante bleiben die Konturteilschnitte K1 , K2, K3, K4 in ihrer Geometrie unverändert. Die Konturteilschnitte K1 , K2, K3, K4 sind um den Betrag Ay verschoben. Infolgedessen sind auch die Übergabepunkte E1 , E2, E3, E4 um den Betrag Ay verschoben. FIGS. 3a and 3b show variants relating to the production of a contour from a plurality of contour cuts. With broken lines, the band edges of the metal strip 1 shifted in the y direction by the amount Ay are shown. E1, E2, E3 and E4 designate end points or transfer points at which contour cuts K1, K2, K3, K4 begin or end. In the first variant shown in Fig. 3a, the transfer points E1, E2, E3, E4 remain unchanged relative to the center line M. Ie. the displacement of the metal strip 1 in the y direction is compensated in this case by a change in the geometry of the contour cuts K1, K2, K3, K4. In the second variant shown in FIG. 3b, the contour cuts K1, K2, K3, K4 remain unchanged in their geometry. The contour cuts K1, K2, K3, K4 are shifted by the amount Ay. As a result, the transfer points E1, E2, E3, E4 are also shifted by the amount Ay.
Bei der in Fig. 4 gezeigten Verfahrensvariante ist stromabwärts der ersten Ab- Standsmesseinrichtung 3 eine dritte Abstandsmesseinrichtung 5 vorgesehen, mit der ein dritter Ist-Abstand 13 der ersten Bandkante des Blechbands 1 gemessen werden kann. Aus einem Vergleich des ersten Ist-Abstands 11 und des dritten Ist- Abstands 13 kann mittels des Steuerprogramms ein Winkel α ermittelt werden, welcher eine Schräglage des Blechbands 1 gegenüber der x-Richtung beschreibt. Unter Verwendung des Winkels α ist es möglich, die ursprünglich vorgegebene Lage der Kontur K nicht nur in y-Richtung zu verschieben, sondern auch um den Winkel α zu rotieren. Es ergibt sich in diesem Fall die mit der punktierten Linie gezeigte korrigierte Kontur K'. In the method variant shown in FIG. 4, a third distance measuring device 5 is provided downstream of the first distance measuring device 3, with which a third actual distance 13 of the first band edge of the sheet metal strip 1 can be measured. From a comparison of the first actual distance 11 and the third actual distance 13, an angle α can be determined by means of the control program, which describes an inclined position of the sheet-metal strip 1 with respect to the x-direction. Using the angle α, it is possible not only to shift the originally predetermined position of the contour K in the y-direction, but also to rotate by the angle α. In this case, the corrected contour K 'shown by the dotted line results.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Blechband 1 sheet metal strip
2 Blechplatine  2 sheet metal plate
3 erste Abstandsmesseinrichtung3 first distance measuring device
4 zweite Abstandsmesseinrichtung4 second distance measuring device
5 dritte Abstandsmesseinrichtung 5 third distance measuring device
A1 erster Arbeitsbereich A1 first work area
A2 zweiter Arbeitsbereich  A2 second work area
A3 dritter Arbeitsbereich  A3 third work area
E1 erster Übergabepunkt  E1 first delivery point
E2 zweiter Übergabepunkt  E2 second transfer point
E3 dritter Übergabepunkt  E3 third handover point
E4 vierter Übergabepunkt  E4 fourth transfer point
11 erster Ist-Abstand  11 first actual distance
12 zweiter Ist-Abstand  12 second actual distance
13 dritter Ist-Abstand  13 third actual distance
K Kontur  K contour
K1 erster Konturteilschnitt  K1 first contour cut
K2 zweiter Konturteilschnitt  K2 second contour cut
K3 dritter Konturteilschnitt  K3 third contour cut
K4 vierter Konturteilschnitt  K4 fourth contour cut
L Laserschneidkopf  L laser cutting head
L1 erster Laserschneidkopf  L1 first laser cutting head
L2 zweiter Laserschneidkopf L2 second laser cutting head
L3 dritter Laserschneidkopf L3 third laser cutting head
M Mittellinie  M midline
S1 erste Soll-Lage der Bandkante S1 first desired position of the band edge
S2 zweite Soll-Lage der BandkanteS2 second desired position of the band edge
U1 erster Überlappungsbereich U2 zweiter UberlappungsbereichU1 first overlap area U2 second overlap area
U3 dritter ÜberlappungsbereichU3 third overlap area
U4 vierter ÜberlappungsbereichU4 fourth overlap area
W Wegmesseinrichtung W path measuring device
X Transportrichtung  X transport direction
α Winkel der Bandkanteα angle of the band edge
Ayl erste Abweichung Ayl first deviation
Ay2 zweite Abweichung  Ay2 second deviation
Ay Abweichung in y-Richtung  Ay deviation in the y direction

Claims

Patentansprüche claims
1 . Verfahren zum Schneiden einer Blechplatine (2) mit einer vorgegebenen Kontur (K) aus einem kontinuierlich in einer Transportrichtung (x) geförderten Blechband (1 ) mit folgenden Schritten: 1 . Method for cutting a sheet metal blank (2) having a predetermined contour (K) from a sheet metal strip (1) conveyed continuously in a transport direction (x), comprising the following steps:
Bereitstellen zumindest einer Laserschneidvorrichtung mit zumindest einem sowohl in die Transportrichtung (x) als auch in eine senkrecht dazu verlaufende y- Richtung bewegbaren Laserschneidkopf (L, L1 , L2, L3) und einer Steuereinrich- tung zur Steuerung der Bewegung des Laserschneidkopfs (L, L1 , L2, L3) entlang einem zur vorgegebenen Kontur (K) korrespondierenden Schneidweg, fortlaufendes Messen eines ersten Abstands (11 ) einer ersten Bandkante des Blechbands (1 ) von einem festen ersten Messpunkt in y-Richtung mittels einer stromaufwärts der Laserschneidvorrichtung vorgesehenen ersten Abstandsmess- einrichtung (3), Providing at least one laser cutting device with at least one laser cutting head (L, L1, L2, L3) movable both in the transport direction (x) and in a perpendicular thereto y direction and a control device for controlling the movement of the laser cutting head (L, L1 , L2, L3) along a cutting path corresponding to the predetermined contour (K), continuously measuring a first distance (11) of a first band edge of the sheet-metal strip (1) from a fixed first measuring point in the y-direction by means of a first distance measuring device provided upstream of the laser cutting device. device (3),
Übermitteln erster Abstandsmesswerte an die Steuereinrichtung, Berechnen eines korrigierten Schneidwegs unter Verwendung eines vorgegebenen Schneidwegs und der ersten Abstandsmesswerte mittels eines Steuerprogramms der Steuereinrichtung, und Transmitting first distance measurement values to the control device, calculating a corrected cutting path using a predetermined cutting path and the first distance measurement values by means of a control program of the control device, and
Erzeugen eines Schnitts im Blechband (1 ) durch Bewegen des Laserschneidkopfs (L, L1 , L2, L3) entlang des korrigierten Schneidwegs. Producing a cut in the sheet metal strip (1) by moving the laser cutting head (L, L1, L2, L3) along the corrected cutting path.
2. Verfahren nach Anspruch 1 , wobei ein zweiter Abstand (12) einer der ersten Bandkante gegenüberliegenden zweiten Bandkante von einem festen zweiten Messpunkt in y-Richtung mittels einer stromaufwärts der Laserschneidvorrichtung vorgesehenen zweiten Abstandsmesseinrichtung (4) fortlaufend gemessen wird. The method of claim 1, wherein a second distance (12) of a second band edge opposite the first band edge is continuously measured from a fixed second measurement point in the y direction by means of a second distance measuring device (4) provided upstream of the laser cutting device.
3. Verfahren nach einem der vorhergehenden Ansprüche, wobei der korrigierte Schneidweg zusätzlich unter Verwendung der zweiten Abstandsmesswerte (12) berechnet wird. A method according to any one of the preceding claims, wherein the corrected cutting path is additionally calculated using the second distance measurement values (12).
4. Verfahren nach einem der vorhergehenden Ansprüche, wobei aus einer Mehrzahl zeitlich oder örtlich aufeinanderfolgender der erster (11 ) und/oder zweiter Abstandsmesswerte jeweils zumindest ein Mittelwert gebildet und zur Berechnung des korrigierten Schneidwegs die Mittelwerte verwendet werden. 4. The method according to any one of the preceding claims, wherein from a plurality of temporally or locally successive of the first (11) and / or second distance measured values in each case at least one mean value formed and used to calculate the corrected cutting path, the average values.
5. Verfahren nach einem der vorhergehenden Ansprüche, wobei der 5. The method according to any one of the preceding claims, wherein the
Schneidweg vor der Erzeugung des Schnitts im Blechband (1 ) auf der Grundlage zumindest eines aus den ersten und/oder zweiten Abstandsmesswerten berechneten Mittelwerts korrigiert wird.  Cutting path is corrected before the production of the cut in the sheet metal strip (1) on the basis of at least one of the first and / or second distance measured values calculated average value.
6. Verfahren nach einem der vorhergehenden Ansprüche, wobei der korrigierte Schneidweg während der Erzeugung des Schnitts im Blechband (1 ) fortlaufend berechnet wird. 6. The method according to any one of the preceding claims, wherein the corrected cutting path during the generation of the cut in the sheet metal strip (1) is calculated continuously.
7. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Berech- nung des korrigierten Schneidwegs in Echtzeit durchgeführt wird. 7. The method of claim 1, wherein the computation of the corrected cutting path is performed in real time.
8. Verfahren nach einem der vorhergehenden Ansprüche, wobei fortlaufend ein in Transportrichtung (x) zurückgelegter Weg des Blechbands (1 ) mittels einer stromaufwärts der Laserschneidvorrichtung vorgesehenen Wegmesseinrichtung (W) gemessen wird. 8. The method according to any one of the preceding claims, wherein continuously in the transport direction (x) traveled path of the metal strip (1) by means of a provided upstream of the laser cutting device displacement measuring device (W) is measured.
9. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Wegmesswerte an die Steuereinrichtung übermittelt werden und mittels des Steuerprogramms der korrigierte Schneidweg unter Verwendung des zur Erzeugung der Kontur (K) vorgegebenen Schneidwegs und der Wegmesswerte berechnet wird. 9. The method according to any one of the preceding claims, wherein the path measured values are transmitted to the control device and by means of the control program, the corrected cutting path using the predetermined for generating the contour (K) cutting path and the Wegmesswerte is calculated.
10. Verfahren nach einem der vorhergehenden Ansprüche, wobei die ersten und/oder zweiten Abstands- und die Wegmesswerte in einem Abstand von höchsten 2 m, vorzugsweise höchsten 1 m, stromaufwärts der Laserschneidvorrichtung erfasst werden. 10. The method according to any one of the preceding claims, wherein the first and / or second distance and the Wegmesswerte at a distance of at most 2 m, preferably at the highest 1 m, detected upstream of the laser cutting device.
1 1 . Verfahren nach einem der vorhergehenden Ansprüche, wobei die ersten und/oder zweiten Abstands- und die Wegmesswerte etwa im selben Abstand stromaufwärts der Laserschneidvorrichtung erfasst werden. 1 1. Method according to one of the preceding claims, wherein the first and / or second distance and the Wegmesswerte be detected at about the same distance upstream of the laser cutting device.
12. Verfahren nach einem der vorhergehenden Ansprüche, wobei zumindest einer der ersten und/oder zweiten Abstandswerte als Regelgröße zur Regelung einer y-Position einer in y-Richtung bewegbaren Haspel verwendet wird, auf der das Blechband (1 ) als Coil aufgenommen ist. 12. The method according to any one of the preceding claims, wherein at least one of the first and / or second distance values is used as a controlled variable for controlling a y-position of a movable in the y direction reel on which the sheet metal strip (1) is accommodated as a coil.
13. Verfahren nach einem der vorhergehenden Ansprüche, wobei mittels einer dritten Abstandsmesseinrichtung (5) ein dritter Abstand (13) der ersten Bandkante von einem festen dritten Messpunkt in y-Richtung fortlaufend gemessen wird. 13. The method according to any one of the preceding claims, wherein by means of a third distance measuring device (5), a third distance (13) of the first band edge is continuously measured from a fixed third measuring point in the y direction.
14. Verfahren nach einem der vorhergehenden Ansprüche, wobei die dritte Ab- Standsmesseinrichtung (5) im Bereich oder stromaufwärts der Laserschneidvorrichtung angeordnet ist. 14. The method according to any one of the preceding claims, wherein the third Abstandsmessinrichtung (5) is arranged in the region or upstream of the laser cutting device.
15. Verfahren nach einem der vorhergehenden Ansprüche, wobei mittels der Laserschneidvorrichtung eine erster Konturteilschnitt (K1 ) hergestellt wird, wobei mittels einer stromabwärts der Laserschneidvorrichtung vorgesehenen weiteren Laserschneidvorrichtung ein zweiten Konturteilschnitt (K2) hergestellt wird, und wobei mittels des Steuerprogramms ein zum zweiten Konturteilschnitt (K2) korrespondierender vorgegebener weiterer Schneidweg unter Verwendung zumindest des ersten Abstandswerts so korrigiert wird, dass der weitere Schneidweg in einen Endabschnitt des ersten Schneidwegs eingreift. 15. The method according to any one of the preceding claims, wherein by means of the laser cutting device, a first contour section (K1) is produced, wherein by means of a downstream of the laser cutting device provided further laser cutting device, a second contour section (K2) is prepared, and wherein by means of the control program to a second contour section ( K2) corresponding predetermined further cutting path is corrected using at least the first distance value so that the further cutting path engages in an end portion of the first cutting path.
16. Verfahren nach einem der vorhergehenden Ansprüche, wobei der 16. The method according to any one of the preceding claims, wherein the
Schneidweg und der weitere Schneidweg so korrigiert werden, dass eine vorgegebene Lage eines Übergabepunkts (E1 , E2, E3, E4) am Ende des ersten Konturteilschnitts (K1 ) unverändert bleibt. Cutting path and the further cutting path are corrected so that a predetermined position of a transfer point (E1, E2, E3, E4) at the end of the first contour section (K1) remains unchanged.
17. Verfahren nach einem der vorhergehenden Ansprüche, wobei der 17. The method according to any one of the preceding claims, wherein the
Schneidweg so korrigiert wird, dass ein Übergabepunkt (E1 , E2, E3, E4) am Ende des Schneidwegs unter Verwendung des ersten Abstandswerts korrigiert wird. Cutting path is corrected so that a transfer point (E1, E2, E3, E4) is corrected at the end of the cutting path using the first distance value.
18. Verfahren nach einem der vorhergehenden Ansprüche, wobei die Ab- standsmesseinrichtung/en (3, 4, 5) in y-Richtung bezüglich der Bandkante nachgeführt wird/werden, so dass die Bandkante stets in deren Messbereich sich befindet. 18. Method according to one of the preceding claims, wherein the distance measuring device (s) (3, 4, 5) is / are tracked in the y-direction relative to the strip edge, so that the strip edge is always in its measuring range.
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US20150190883A1 (en) 2015-07-09
EP2828029B1 (en) 2016-04-13
JP6148353B2 (en) 2017-06-14
ES2575794T3 (en) 2016-07-01
DE102013203384B4 (en) 2015-07-23
JP2016511698A (en) 2016-04-21
WO2014131658A1 (en) 2014-09-04
CN104520055A (en) 2015-04-15
CN104520055B (en) 2017-06-13
DE102013203384A1 (en) 2014-08-28

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